/*
 * This file is part of LiquidBounce (https://github.com/CCBlueX/LiquidBounce)
 *
 * Copyright (c) 2015 - 2025 CCBlueX
 *
 * LiquidBounce is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * LiquidBounce is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with LiquidBounce. If not, see <https://www.gnu.org/licenses/>.
 */
package net.ccbluex.liquidbounce.api.services.auth

import java.security.MessageDigest
import java.util.*

object PKCEUtils {
    fun generatePKCE(): Pair<String, String> {
        val codeVerifier = UUID.randomUUID().toString().replace("-", "")
        val codeChallenge = Base64.getEncoder().encodeToString(
            MessageDigest.getInstance("SHA-256").digest(codeVerifier.toByteArray())
        ).replace("=", "").replace("+", "-").replace("/", "_")
        return codeVerifier to codeChallenge
    }
}
